Written by

Brian Truitt, USA TODAY

Warm Bodies director Jonathan Levine found that out when adapting Isaac Marion's novel of the same name for a horror story/romantic comedy starring Nicholas Hoult as R, a dashing, hoodie-clad member of the undead, and Teresa Palmer as the girl he falls for - and who makes R a little bit more human along the way.

In the special-features bonus of the Warm Bodies Blu-ray/DVD (out Tuesday), Levine explains that the biggest challenge in taking a story from the page to the cinema is that there so many ideas in a book it's hard to distill ...